> ## Documentation Index
> Fetch the complete documentation index at: https://clickhouse.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# max_rand_* session settings

> ClickHouse session settings in the max_rand_* generated group.

export const SettingsInfoBlock = ({type, default_value, changeable_without_restart}) => {
  return <div className="not-prose" style={{
    display: "flex",
    flexWrap: "wrap",
    alignItems: "baseline",
    columnGap: "0.5rem",
    rowGap: "0.125rem",
    margin: "0.375rem 0",
    fontSize: "0.8125rem",
    lineHeight: "1.125rem"
  }}>
      <div style={{
    fontWeight: 600,
    opacity: 0.72
  }}>Type</div>
      <div style={{
    overflowWrap: "anywhere"
  }}>{type}</div>
      <div style={{
    fontWeight: 600,
    opacity: 0.72,
    marginInlineStart: "0.5rem"
  }}>Default</div>
      <div style={{
    overflowWrap: "anywhere"
  }}>{default_value}</div>
      {changeable_without_restart && <div style={{
    fontWeight: 600,
    opacity: 0.72,
    marginInlineStart: "0.5rem"
  }}>
          Changeable without restart
        </div>}
      {changeable_without_restart && <div style={{
    overflowWrap: "anywhere"
  }}>
          {changeable_without_restart}
        </div>}
    </div>;
};

These settings are available in [system.settings](/docs/reference/system-tables/settings) and are autogenerated from [source](https://github.com/ClickHouse/ClickHouse/blob/master/src/Core/Settings.cpp).

<h2 id="max_rand_distribution_parameter">
  max\_rand\_distribution\_parameter
</h2>

<SettingsInfoBlock type="Float" default_value="1000000" />

<VersionHistory rows={[{"id": "row-1","items": [{"label": "26.4"},{"label": "1000000"},{"label": "New setting to limit shape parameters in random distribution functions, preventing hangs with extreme inputs."}]}]} />

Maximum value for distribution shape parameters in random distribution functions such as `randChiSquared`, `randStudentT`, and `randFisherF`. This prevents extremely long computation times with extreme parameter values.

<h2 id="max_rand_distribution_trials">
  max\_rand\_distribution\_trials
</h2>

<SettingsInfoBlock type="UInt64" default_value="1000000000" />

<VersionHistory rows={[{"id": "row-1","items": [{"label": "26.4"},{"label": "1000000000"},{"label": "New setting to limit trial counts in random distribution functions, preventing hangs with extreme inputs."}]}]} />

Maximum number of trials allowed for random distribution functions such as `randBinomial` and `randNegativeBinomial`. This prevents extremely long computation times with large trial counts.